Tire pump



Se t. 30, 1930. c. I. MATSON TIRE: PUMP Filed Feb.-1'7, 1928 \NVENTOR Z/Y/ITfiM ATToRNEYs Patented Sept. 30, 1930 p A UNITED STATES PATENT OFFICE j v A ivnn laA'rson, orvon oaeo, ILLINOIS i v I mmnrmvrr Application, filed Februai-y 1?, 1923." Serial in. 255,081.

My invention relates to improvements in spring 9. A disc 10 is mounted upon the tire pumps, and. it consists in the combinaspring 9 and disposed relatively near the tions,constructions, and arrangements hereflange 6. A toot valve. comprising a scaling in described andclaimed. I disc 11 and a retaining member 12 is secured An object of my invention is to providea to the disc by means of an y suitable rivet tire pump of the type actuated by a recipro- 13. flhe foot valve is disposed concentrically eating plunger, and inwhieh anauxiliary with respect to the opening? as shown in chamber is provided forreceiving thevair Figure 1. i b V p con'ipressed by the movement of the piston, A piston 14: secured to a piston. rod 15 is 10 from which chamber the compressed air may disposed within the tubular member 4. The be permitted to passinto a tire independently piston rod 15 extends through an opening in of the movement of the plunger, thereby acover 16 disposedupon oneendof the tubuprovidinga pump which, is relatively easy lar members. A handlel? is secured to the to operate. f i b a piston rod 15. Openings 18 are provided in i 15' A further object is to provideatire pump the cover 16. a A sealing. disc 19 is disposed at which is relativelysimple in construction and between one end'of the tubular member 4 and easy to operate, and in which means isprotli efiange 6. i V I i H vided whereby the air pressure maybe read gauge G is mounted upon the baseplate during the operation of the pump. 1 and adjacent the tubular members 3 and 20 Other objects and advantages will appear 4. The gauge G is provided with a plunger 7 in the following specification and the novel 20 having Sui able indi ia 21 thereon, as features of the invention will be particularly Shown in Figure 1. Suitable stop members pointed out in the appended claims. 22 and 23 are secured to the tubular member My invention is illustrated in the accom- 4 and in longitudinal alignment with the 25'panying drawings, forming part of this applunger 20. The chamber portion of the 7 plication, in which gauge Gr communicates with the chamber Figure 1 is a sectional View taken through wlthln the tubular member 3 b 1 means ot a V .3 c my device. passageway 24. A second passageway 25 is Figure 2 is an enlarged sectional 1 detail PrOVided in the base plate 1. The passage" view of a portion of the device shown in way 25 communicates with the chamber 55 Figure 1, b within the tubular member 3 and a pump Figure 3 is a top plan view of the device hose 26 having a coupling means 27, adapted shown in Figure 2, and I to be secured to the ordinary valve stem with Figure lis a sectional view taken substanwhich automobile tires are provlded. tially along the line 4; l of F1gure 1. Referring to Figure 2. it will be noted that 3;,

I11 carrying out n y invention I make use the coupling 1116:1115 is rotatably 'lllOUllh-Hl of a base plate 1 having a threaded bore 2 upon a hose stem 28 which is secured to one in one face thereof within which the threadend of the pump boss 26 by means of a suited end of a tubular member 3 is disposed. able collar 29. 'A valve stem releasing mem-' 40 The tubular member 3 is connected'with a b61730 is disposed withinthe coupling means tubular member 4 by means of a coupling 5. 27 and the hose stem 28. The valve stem re- Thetubular members 3 and a are disposed in leasing member 30 is provided with an elonlongitudinal alignment. The coupling 5 is gated slot 31,.see Figure 3. A suitable valve provided with a flange 6 having a central 32 is mounted uponthebase plate 1 and is in opening 7. A supporting ring 8 is disposed communication with the passageway 25. ti 7 between one end of the tubular member 3 and Standard pressure gauges may be applied a portion of the coupling5. The ring 8 is to the valve 32 for taking the pressure readv preferably of fibrous materials and serves a ings when desired. b b a two-fold purpose in that it acts as a sealing From the'foregoing description of the va-- means and also a supporting means for a rious parts of the device, the operation therewe of may be readily understood. The operation of the piston 1a is in the usual manner, that is to say, it is reciprocated within the tubular member 4 by means of the handle 17. Downward movement of the piston 14 will force the compressed air against the foot valve. The pressure of the compressed air is sufiicicnt to move the foot valve away from the flange 6 against the tension of the coil spring 9, whereupon the compressed air will pass into the chamber within the tubular member Prior to this however the coupling means 27 has been screwed down upon the valve stem in the tire which is being filled, resulting in a contact between the valve stem releasing member and the valve stem for opening the valve stem in the tire. As soon as the valve stem in the tire is opened, the pressure in the tire and in the chamber within the tubular member 3 is equalized. Continued reciprocation of the piston l-i'r will increase the pressure within the tubular member 3, and as this pressure increases, the compressed air will flow gradually through the pump hose 26 and into the tire.

It will be seen that the foot valve is relatively large so that the air compressed by the movement of the piston 14 may easily pass the foot valve and immediately upon retraction of the piston let, the foot valve will be closed by the spring 9, whereupon the compressed air is locked within the tubular member Thus it will be seen that the compressed air within the member 8 will flow of its own pressure gradually into the tire, thereby relieving the operator of the pump of the additional work of forcing the compressed air through the constricted passage ways in the pump hose and particularly around the valve stem in the tire.

During the operation of the pump, the plunger 20 will of course rise in accordance with the amount of pressure within the tire and is so arrai'iged that the operator can easily take a pressure reading at any time. In order to further expedite the reading of the pressure within the tire, I have provided stop members 22 and 23 which may be adjusted to engage the plunger during its outward movement at a predetermined pressure, thereby indicating to the operator the amount of pressure without actually reading the indieia upon the plunger 20.

I claim:

1. A tire pump comprising a cylinder having plunger means disposed therein, a storage receiver, and valve means disposed between the"c vlinder and said storage receiver for permitting compressed air to be passed from the cylinder to the storage receiver and held therein when said plunger means is actuated, said storage receiver having a'capacity suflicient to receive the compressed air from said cylinder, and means communieating with said storage receiver and arranged for connection with a tire valve, whereby the tire may be inflated by the compressed air flowing from said storage re- CGIVBI.

2. A tire pump comprising a cylinder and a storage receiver, a partition disposed between the cylinder and the storage receiver and being provided with an opening, valve means for closing the opening, spring means for normally holding said valve in closing relation with the opening in said partition, and plunger means disposed within the cylinder for moving compressed air from the same beyond the valve and into said storage receiver, said storage receiver having suflicient capacity to receive an accumulated volume of compressed air from the cylinder.

3. A tire pump comprising a cylinder and a storage receiver, a partition disposed between the cylinder and the storage receiver and being provided with an opening, valve means for closing the opening, spring means for normally holding said valve in closing relation with the opening in said partition, plunger means disposed within the cylinder for moving compressed air from the same beyond the valve and into said storage receiver, said storage receiver having sufficient capacity to receive an accumulated volume of compressed air from the cylinder, and means communicating with said storage receiver and arranged for connection with an inflating valve, whereby compressed air from said storage receiver may pass through the valve.

Signed at Chicago, in the county of Cook, and State of Illinois, this 14th day of February, A. D. 1928.

CHARLES IVER MATSON.

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